Cubic splines overhaul #37657

Job	Run time
build (windows-latest)	4m 54s
check-bevy-internal-imports	4s
check-cfg	53s
build (ubuntu-latest)	1m 50s
build (macos-latest)	3m 48s
check-doc	8m 0s
check-missing-examples-in-docs	35s
ci	2m 20s
miri	4m 58s
run-examples-macos-metal	4m 19s
toml	2m 41s
typos	10s
check-missing-features-in-docs	27s
markdownlint	1m 10s
check-compiles	2m 32s
msrv	47s
build-wasm	1m 13s
	40m 41s

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